package com.scu.phototabuser;

import android.app.Application;
import android.content.Context;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.os.Build;
import android.os.Environment;
import android.os.Looper;
import android.preference.PreferenceManager;
import android.util.Log;
import android.widget.Toast;

import com.facebook.drawee.backends.pipeline.Fresco;
import com.scu.phototabuser.exception.AppException;
import com.scu.phototabuser.util.ToastUtil;

import java.io.File;
import java.io.FileOutputStream;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.io.Writer;
import java.lang.reflect.Field;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;

/**
 * Created by tianfei on 2017/4/8.
 */

public class App extends Application {

    public static Context context;
    public static final String APP_NAME="phototab";

    public static final String APP_SECRET ="sdsaFSSSxxa";

    @Override
    public void onCreate() {
        super.onCreate();
        context=this;

        //init fresco
        Fresco.initialize(this);

        //初始化设置中的所有参数
        PreferenceManager.setDefaultValues(this,R.xml.preferences,false);

        //CrashHandler crashHandler = CrashHandler.getInstance();
        //crashHandler.init(getApplicationContext());

    }

    static class CrashHandler implements Thread.UncaughtExceptionHandler {

        public static final String TAG = "CrashHandler";

        //系统默认的UncaughtException处理类
        private Thread.UncaughtExceptionHandler mDefaultHandler;
        //CrashHandler实例
        private static CrashHandler INSTANCE = new CrashHandler();
        //程序的Context对象
        private Context mContext;
        //用来存储设备信息和异常信息
        private Map<String, String> infos = new HashMap<String, String>();

        //用于格式化日期,作为日志文件名的一部分
        private DateFormat formatter = new SimpleDateFormat("yyyy-MM-dd-HH-mm-ss");

        /** 保证只有一个CrashHandler实例 */
        private CrashHandler() {
        }

        /** 获取CrashHandler实例 ,单例模式 */
        public static CrashHandler getInstance() {
            return INSTANCE;
        }

        /**
         * 初始化
         *
         * @param context
         */
        public void init(Context context) {
            mContext = context;
            //获取系统默认的UncaughtException处理器
            mDefaultHandler = Thread.getDefaultUncaughtExceptionHandler();
            //设置该CrashHandler为程序的默认处理器
            Thread.setDefaultUncaughtExceptionHandler(this);
        }

        /**
         * 当UncaughtException发生时会转入该函数来处理
         */
        @Override
        public void uncaughtException(Thread thread, Throwable ex) {

            Log.e(TAG, "uncaughtException: "+ex.getClass());

            if (!handleException(ex) && mDefaultHandler != null) {
                //如果用户没有处理则让系统默认的异常处理器来处理
                mDefaultHandler.uncaughtException(thread, ex);
            }
       /* else if(ex.getCause().toString().contains("AppException")){
        //else if(ex instanceof AppException){


            Log.e(TAG, "CaughtException: "+ex);

            //经过上面的if分支保证ex被记录到log
            //如果这个ex是程序自定义的已知异常，捕获到了即可，不必结束进程
        }*/
            else {
                //如果异常不是已知异常，结束进程
                try {
                    Thread.sleep(1300);
                } catch (InterruptedException e) {
                    Log.e(TAG, "error : ", e);
                }
                //退出程序
                android.os.Process.killProcess(android.os.Process.myPid());
                System.exit(1);
            }
        }

        /**
         * 自定义错误处理,收集错误信息 发送错误报告等操作均在此完成.
         *
         * @param ex
         * @return true:如果处理了该异常信息;否则返回false.
         */
        private boolean handleException(Throwable ex) {
            if (ex == null) {
                return false;
            }
            //使用Toast来显示异常信息
            new Thread() {
                @Override
                public void run() {
                    Looper.prepare();
                    ToastUtil.makeToast(mContext,"很抱歉,程序出现异常,即将退出.");
                    Looper.loop();
                }
            }.start();
            //收集设备参数信息
            collectDeviceInfo(mContext);
            //保存日志文件
            saveCrashInfo2File(ex);
            return true;
        }

        /**
         * 收集设备参数信息
         * @param ctx
         */
        public void collectDeviceInfo(Context ctx) {
            try {
                PackageManager pm = ctx.getPackageManager();
                PackageInfo pi = pm.getPackageInfo(ctx.getPackageName(), PackageManager.GET_ACTIVITIES);
                if (pi != null) {
                    String versionName = pi.versionName == null ? "null" : pi.versionName;
                    String versionCode = pi.versionCode + "";
                    infos.put("versionName", versionName);
                    infos.put("versionCode", versionCode);
                }
            } catch (PackageManager.NameNotFoundException e) {
                Log.e(TAG, "an error occured when collect package info", e);
            }
            Field[] fields = Build.class.getDeclaredFields();
            for (Field field : fields) {
                try {
                    field.setAccessible(true);
                    infos.put(field.getName(), field.get(null).toString());
                    Log.d(TAG, field.getName() + " : " + field.get(null));
                } catch (Exception e) {
                    Log.e(TAG, "an error occured when collect crash info", e);
                }
            }
        }

        /**
         * 保存错误信息到文件中
         *
         * @param ex
         * @return  返回文件名称,便于将文件传送到服务器
         */
        private String saveCrashInfo2File(Throwable ex) {

            StringBuffer sb = new StringBuffer();
            for (Map.Entry<String, String> entry : infos.entrySet()) {
                String key = entry.getKey();
                String value = entry.getValue();
                sb.append(key + "=" + value + "\n");
            }

            Writer writer = new StringWriter();
            PrintWriter printWriter = new PrintWriter(writer);
            ex.printStackTrace(printWriter);
            Throwable cause = ex.getCause();
            while (cause != null) {
                cause.printStackTrace(printWriter);
                cause = cause.getCause();
            }
            printWriter.close();
            String result = writer.toString();
            sb.append(result);
            try {
                long timestamp = System.currentTimeMillis();
                String time = formatter.format(new Date());
                String fileName = "crash-" + time + "-" + timestamp + ".log";
                if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
                    String path = Consts.CRASH_FILE_PATH;
                    File dir = new File(path);
                    if (!dir.exists()) {
                        dir.mkdirs();
                    }
                    FileOutputStream fos = new FileOutputStream(path + fileName);
                    fos.write(sb.toString().getBytes());
                    fos.close();
                }
                return fileName;
            } catch (Exception e) {
                Log.e(TAG, "an error occured while writing file...", e);
            }
            return null;
        }
    }
}


